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Finding the Fourth Proportional to 154,808.10, 231,989.81 and 66,037.77

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Solution

The fourth proportional to 154,808.10, 231,989.81 and 66,037.77 is: 98,961.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,808.10 : 231,989.81 = 66,037.77 : x
  2. Step 2: Convert to fraction form
    154,808.10/231,989.81 = 66,037.77/x
  3. Step 3: Cross multiply
    154,808.10x = 231,989.81 × 66,037.77
  4. Step 4: Simplify right side
    154,808.10x = 15,320,089,384.93
  5. Step 5: Solve for x
    x = 15,320,089,384.93/154,808.10
  6. Step 6: Final answer
    x = 98,961.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.